Audio: Peak volume: Add Kconfig to select the period of reporting peak meter value.

[andrula-song]

Add kconfig to select the period of reporting peak meter value. The default value is reporting peak meter every 10 ms.

[andrula-song]

Test on mtlp-rvp-nocodec with 32bit format, here is the result.
the perf of original code is:
[00:00:54.438,273] component: comp_copy: comp:0 0x60000 perf comp_copy samples 48 period 1000 cpu avg 333 peak 343
[00:00:54.437,185] component: comp_copy: comp:1 0x60001 perf comp_copy samples 48 period 1000 cpu avg 317 peak 325

the perf of setting as updating every 5ms is :
[00:00:40.105,926] component: comp_copy: comp:0 0x60000 perf comp_copy samples 48 period 1000 cpu avg 309 peak 346
[00:00:40.104,835] component: comp_copy: comp:1 0x60001 perf comp_copy samples 48 period 1000 cpu avg 301 peak 338

the perf of setting as updating every 10ms is :
[00:00:21.674,308] component: comp_copy: comp:0 0x60000 perf comp_copy samples 48 period 1000 cpu avg 301 peak 339

[00:00:22.697,213] component: comp_copy: comp:1 0x60001 perf comp_copy samples 48 period 1000 cpu avg 297 peak 336

the perf of setting as updating every 100ms is :
[00:00:24.744,386] component: comp_copy: comp:0 0x60000 perf comp_copy samples 48 period 1000 cpu avg 301 peak 333
[00:00:25.767,296] component: comp_copy: comp:1 0x60001 perf comp_copy samples 48 period 1000 cpu avg 297 peak 345

since the result of 10ms is almost the same with 100ms, so I set the default value as 10ms to update peak meter. And in this way we can save about 9.6% cycles.

[singalsu]

Looks good, thanks!

[btian1]

before go to merge, shall we contact windows team to test peak_vol again? since current CI does not cover peak_vol case.

[kv2019i]

@btian1 wrote:

before go to merge, shall we contact windows team to test peak_vol again? since current CI does not cover peak_vol case.

This is covered in "Internal Intel CI System/merge/codecheck" tests.

[kv2019i]

#7191 is hitting in https://sof-ci.01.org/sofpr/PR7715/build9082/devicetest/index.html , but it's seen on the daily tests witout this PR. https://sof-ci.01.org/sofpr/PR7715/build9083/devicetest/index.html has only unrelated fails. I'll proceed with merge.